Automatic monte-jus



April 15, 1924. 1,490,826

H. HOWARD ET AL AUTOMATIC MONTEJUS Filed Feb. 9, 1922 2 Sheets-Sheet 1 April 15, 1924. 1,490,826

H. HOWARD ET AL AUTOMATIC MONTEJUS Filed Feb. 9. 1922 2 sheets-sheet` 2 Patented Apr. 15, i224.

avare,

arenaria erica.

arent HENRY HOWRD AND HARRY 3, MORGAN, OF CLEVELAND, OHIO, ASSGNORS T0 G'RASSELLI CHEMICAL COMPANY, 0F CLEVEMND, OHIO, A COR'PGRATIGN OF @ma AUTOMATIC MONTE-UR appiicauoa nieu rearaary e, ieaa. serial No. 53ans.

To all ichamz't may concern:

Be it known that We, (1) HENRY HOWARD. and (2) HARRY J. MORGAN, citizens of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Automatic Monte-Jus, of which the follouving is a specification.

Our invention 'relates to an automatic montejus and more particularly to a montejus for elevating corrosive liquid chemicals` from.. a lower to a higher level.

An object of our invention is to provide a montejus which is simple in construction, eflicient in operation land, which operates without requiring the ,attention of an attendant. A further object is to provide a montejus of the type described and which is con'- trolled by a sino'le valve, and more specifically, by a single valve which is not subject to the action ofatumes arising from the liquid which is being handled. More specilically an object of the invention is to provide a montejus in which a small amount of air or other pressure fluid is continuously lintroduced into the liquid receptacle and in Whicha pre-v determined increase in pressure in the receptacle opens'a valve to connect the receptacle to a source of Huid pressure for evacuating the same.

One embodiment of our invention is illustrated in the accompanying drawings in Whichi Fig. 1 Vis an elevation, partly in section of the monte-jus;

Fig. 2 is a vertical section of the liquid receptacle and taken at right angles to the section shown in Fig. 1 ;v

Fig. 3 is a vertical section of the liquid receptacle as seen from the rear of Fig. 1, and

Fig. 4 is a vertical section through the regulating valve.

In the drawings, the liquid receptacle blowcase of the montejus is designated eIcy liquid inlet pipe 3, which is provided with a check valve l of any desired type, and a liquid outlet pipe 5 'which has its mouth or lower end.V located near the bottom of the blovvcase 1. A` casting 6` mounted on the cover 2 has a main port 6' providing coxnmunication between the outlet pipe 5 and the delivery or blow-up pipe 7. Depending from vsame cross-sectional area as the pipe 7 communicates With the blow-up pipe 7 through a passage 1n the cover 2-and port 9 in the casting 6. The opening of port 9 into yport 6 down the discharge pipe 7 will not get into the U-pipe and at the same time the normal flow of liquid through 6 when the montejus is discharging must neither materially increase nor diminish the pressure in the U-pipe. All these conditions are provided for in the design shown herein.

Fluid for evacuating the bloWcase 1 enters under pressure through-a `pipe 10 from a regulating valve V which is connected by means of pipe 11 with any suitable source of supply. For convenience, the pressure Huid will -be referred to as compressed air though it is to be understood other fluids may be used, such as steam or other vapor or a gas, provided of course, that the Huid used is inert with respect to the liquid being handled.

The regulating Vvalve V, 'which is located some distance above the highest level of liquid in the supply tank, comprises a casing 12 having ports 13 and 14 which are connected with the source of compressed air and the bloivcase 1 by means of pipes 11 and 10, respectively. Communication between the ports 13 and 14 is controlled by'a valve 15 which has a stem 15 carrying a diaphragm 16. The diaphragm 16 is clamped to the casing 12 by a cover plate 17 and the space below the diaphragm communicates with port 14 through a port 19 which is controlled by a needle valve 20. The upper end of the stem of valve 15 passes loosely through a port 18 in the cover 17, and through this port 18 the upper side of the diaphragm 16 is subjected to atmospheric pressure. The upper end of the stem 15 carries a nut 21 which is connected to a Weighted lever 22. The lever 22 isnivoted to the cover plate 17 by means of li s 23 and carries a weight 24 which may be secured to the lever by means of a setmust be so shaped that any liquid draining i 28 which encloses a flange 29 formed on the cover plate 17 and constituting an extension of the walls of the port 18. The nut 21 fits the stem somewhat loosely so that it may be turned by hand, and the position of nut 21 on the stem, together with a stop screw 27 which is carried n a yoke 28 straddling the lever 22 determines the amount of throw of the diaphragm 16.

A port 30 formed in the lower part of the casing 12 constitutes a by-pass around the valve 15 and this by-pass is controlled by a needle valve 31.

For indicating the quantity of liquid handled a Veeder or other counter 32 is provided, the same being preferably mounted on a bracket,- 33 carried by the valve casing. The handle of the counter 32 is connected to the lever 22 by means of a link 34.

In operation,- acid or other liquid enters the blowcase 1 from a supply tank or other source of supply through the inlet pipe 3. A limited quantity of compressed air is continuously entering the blowcase through the by-pass 30 and pipe 10. While the filling of the blowcase progresses the air has a free vent through the Upipe 8 and the blow-up pipe 7. When the incoming liquid level reaches the open mouth of Upipe 8 and overflows into the same this vent for the air is closed and the pressure builds up inside the blowcase. The diaphragm 16 is subject to the pressure in the blowcase and when the pressure reaches a predetermined point the diaphra m operates to open the main valve 15 there y establishing free communication between the source of air supply and the blowcase. By means of the adjustable Weight 24cm the valve lever 22, the valve 15 may be set to open at any desired pressure, say five to ten pounds. When the air pressure in the blowcase becomes equal to or greater than that due to the level of the acid 1n the su ly tank the check valve 4 closes and the iquid is forced out through the blow-up pipe 7. As the pressure in the open end of the vent pipe 8 is the same as in the blow-case the level of the liquid in the open end of the pipe 8 will follow down with and will be the same as the level of the liquid in the blowcase. When the liquid level reaches the, bend in the Upipe the compressed air will immediately vent or kick through the Upipe and casting 6, thus releasing the pressure in the blowcase. When the pressure falls below the point for which the valve has been set, the weighted lever closes valve 15 and only a limited quantity of compressed air can enter through the bypass 30. The cycle of operation is then comleted as check valve 4 opens to allow more i uid to enter the blowcase. The rate at w ich the limited quantity of air enters the blowcase may be regulated bv adjusting the needle valve 31 ,and the needle valve 20 may be likewise adjusted to throttle down the port 19, thereby preventing too rapid a movement of the diaphragm 16. j y

It is to be noted that the cross-sectional area of pipe 5 is substantially larger than 70 that ofthe discharge pipe 7. This construction is essential if the valve actuated counter 32 is to accurately record the quantity.4 of liquid handled. As the quantity of liquid passing out through the Upipe 8 is insig-` 75 nificant there is substantially no drop 1n pressure due to friction losses between the open end of pipe 8 and the port 9 in the casting 6. lf then the friction losses in pipe 5 cause a drop in pressure between the mouth 80 of the `pipe and port 6", this reduction in pressure would be communicated through port 9 to the Upipe 8 and would cause the montejus to kick before the liquid level in the blowcase falls to the return bend of the 86 Upipe. The exact point at which the air pressure would be lrelieved. would .vary with the friction losses in pipe 5 and this in turn would vary with the rate of flow through pipe 5, which rate depends upon the prese0 sure of the air supply together with the relative size of the discharge pipe 7 lt is therefore essential that the pressure drop established in the port 6 of casting 6 due to the flowY through pipe xshall be the same as the pressure droB in the port 9 due to the flow through the -pipe, that is to say negligible. We have found that satisfactory results may be obtained by using a 4 pipe for the outlel ipe 5 and a 2 pipe for the discharge pipe 100 7), or similar relative dimensions for other capacities. The relative size of the Upipe has no influence on this point but is preferably made the same size as the discharge pipe 7 to facilitate the release of air when 10a the montejus has kicked It is to be understood however that other sizes of pipes may be used so long as the condition above stated is satisfied.

It will be observed that the parts of regulating valve are not subject to damage bj.l fumes arising from the liquid heilig handled since the continuous supply ot' a limited uantity of air to the blowcase prevents such umes from entering the airfpipe 10.

While we have described what we now believe to be the preferred embodiment of our invention it is to be understood this embodiment is merely illustrative and that various changes may be made in the parts, their rela- 12o tive size, shape and proportion without departing from the spirit of our invention.

We claim- 1. An automatic montejus comprising a receptacle having a liquid inlet provided with a check-valve andra liquid outlet, a source of compressed air, means for continuously supplying a limited quantity of compressed air to said receptacle, and means subject to the pressure `in said receptacle 1 inatteso tor Yopening counication between said source of compressed air and said recepta.

subject to thepressure in said receptacle for opening communication between said source of compressed air and said receptacle when a predetermined pressure has been established.

3. An automatic montejus comprising a receptacle having a liquid inlet provided With a check valve and a liquid outlet, a source of compressed air, means for V continuously supplying a limited quantityof compresed air to said receptacle, a vent port through which such air may escape, neans for forming a liquid seal to close said vent port when the liquid reaches a predetermined level, and means subject. to the pressure in said receptacle for opening communication between said source ofcompressed air and said receptacle when a redetermined pressure has been established.

4. An automatic montejus` comprising a receptacle havin a liquid inlet provided with a check va ve and a liquid outlet, a source of com ressed air, means for continuously supp ying a limited quantity of compressed air to said receptacle, a U-tube having one end communicating with said liquid outlet and havin its other end located within and near tie top ot said receptacle, and means subject to the pressure in said receptacle for supplying compressed air in quantity and under pressure sufficient to evacuate the receptacle.

5. An automatic montejus coniprisin a receptacle having a liquid inlet provi ed with a check valve, an outlet pipe having its mouth near the bottom of said receptacle v a source of compressed air, meansfor con-` tinuously supplying a limitedquantity of compressed air to said receptacle, a 'Utube having one end communicating with said outlet pipe and having its other end located within and near the top of said'receptacle, and means subject to the pressure in said receptacle for supplying compressed air in quantity and under pressure suicient to evacuate the receptacle.

6. An automatic montejus comprising a closed receptacle rovided with a liquid inlet port, anair inlet port, an outlet .port

anda vent port, an outlet pipe connected to said outlet port and having its mouth near the bottom of'thelreceptacle, a U-pipe connected to said vent port and having `its free end located within and near the top of the receptacle and means for connecting said outlet port and vent port to each other and to a discharge pipe..

7. An automatic monetjus comnrisin an open topped receptacle, a cover for sai receptacle, said cover being provided with a liquid inlet port, an.y air inlet port, an outlet port anda vent port, an outlet pipe connected to said outlet port and havin its mouth near the bottom of the receptac e, a U-pi'pe connected to said vent port and having its free end located within and near the top of the receptacle andfmeans for connecting said, outlet port and vent port to each other and to a discharge pipe.

8. An automatic montejus 'comprisin a receptacle *having a vli uid inlet provi ed with a check valve an a liquid outlet, a source of compressed air, and a regulating valve between said source of compressed Vair and said receptacle, said regulating valve comprising a casing, a main valve, ressure controlled means for operating sai valve, a port having a valve therein and extending between said pressure controlled means and the rece tacle side of said valve casing, and a valve by-pass around said main valve.

9. A regulating valve comprising a casing having an inlet and an outlet openin a valve seat and a valve, pressure contro led means for operating said valve, a valve con-V trolled port in said casing between said pressure controlled means and the outlet side of a casin and .a valve controlled bypass around sald valve seat.

10. A vregulating valve-comprising a casing having an inlet and an outlet opening, a valve seat and a valve, a bypass around said valve seat, a chamber in said casing, aiport in said casing extending from said chamber to the outlet side of saidv casing, and means in said chamber operative upon a predetermined increase in pressurey for opening said valve.

l`In testimony whereof, we ax our signa- 

